Well, if you have the RoK expansion, including every single one previous to that one, you can use the spires in Antonica to go up to the Kingdom of Sky area (completely mob free, no danger of adds there) and use the portal to port back down to the Commonlands.
So you do not have to cross Thundering Steppes nor Nektulos Forest (wich is the most dangerous part imo) to meet up.
However, naturally at a lower lvl you do not have any quests that you can do together. Not before Nektulos Forest or Thundering Steppes. So it would be about lvl 18 or so before you will find you can do the same quests. Even then you will get different quests to do at times.